VolumePacker::packLayer() - Code Metrics - Inspection of "Cycle through the entire list of unpacked items wh..." - dvdoug/BoxPacker - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — refactor_prep ( b6784f...5f8508 )

by Doug

created 2020-03-21 19:40 UTC

VolumePacker::packLayer() C

↳ Parent: VolumePacker

Complexity

Conditions	17
Paths	19

Size

Total Lines	81
Code Lines	57

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	56
CRAP Score	17

Importance

Changes	16
Bugs	1	Features	0

Metric	Value
cc	17
eloc	57
nc	19
nop	7
dl	0
loc	81
ccs	56
cts	56
cp	1
crap	17
rs	5.2166
c	16
b	1
f	0

How to fix Long Method Complexity

<?php
/**
 * Box packing (3D bin packing, knapsack problem).
 *
 * @author Doug Wright
 */
declare(strict_types=1);

namespace DVDoug\BoxPacker;

use function count;
use function max;
use function min;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;

/**
 * Actual packer.
 *
 * @author Doug Wright
 */
class VolumePacker implements LoggerAwareInterface
{
    /**
     * The logger instance.
     *
     * @var LoggerInterface
     */
    protected $logger;

    /**
     * Box to pack items into.
     *
     * @var Box
     */
    protected $box;

    /**
     * @var int
     */
    protected $boxWidth;

    /**
     * @var int
     */
    protected $boxLength;

    /**
     * List of items to be packed.
     *
     * @var ItemList
     */
    protected $items;

    /**
     * Whether the box was rotated for packing.
     *
     * @var bool
     */
    protected $boxRotated = false;

    /**
     * @var PackedLayer[]
     */
    protected $layers = [];

    /**
     * Whether the packer is in look-ahead mode (i.e. working ahead of the main packing).
     *
     * @var bool
     */
    protected $lookAheadMode = false;

    /**
     * @var OrientatedItemFactory
     */
    private $orientatedItemFactory;

    /**
     * @var OrientatedItem[]
     */
    private $orientatedItemCache = [];

    /** @var bool */
    private $hasConstrainedItems;

    /**
     * Constructor.
     */
    public function __construct(Box $box, ItemList $items)
    {
        $this->box = $box;
        $this->items = clone $items;

        $this->boxWidth = max($this->box->getInnerWidth(), $this->box->getInnerLength());
        $this->boxLength = min($this->box->getInnerWidth(), $this->box->getInnerLength());
        $this->logger = new NullLogger();

        // we may have just rotated the box for packing purposes, record if we did
        if ($this->box->getInnerWidth() !== $this->boxWidth || $this->box->getInnerLength() !== $this->boxLength) {
            $this->boxRotated = true;
        }

        $this->hasConstrainedItems = $items->hasConstrainedItems();

        $this->orientatedItemFactory = new OrientatedItemFactory($this->box);
        $this->orientatedItemFactory->setLogger($this->logger);
    }

    /**
     * Sets a logger.
     */
    public function setLogger(LoggerInterface $logger): void
    {
        $this->logger = $logger;
        $this->orientatedItemFactory->setLogger($logger);
    }

    /**
     * @internal
     */
    public function setLookAheadMode(bool $lookAhead): void
    {
        $this->lookAheadMode = $lookAhead;
    }

    /**
     * Pack as many items as possible into specific given box.
     *
     * @return PackedBox packed box
     */
    public function pack(): PackedBox
    {
        $this->logger->debug("[EVALUATING BOX] {$this->box->getReference()}", ['box' => $this->box]);

        while ($this->items->count() > 0) {
            $layerStartDepth = $this->getCurrentPackedDepth();

            //do a preliminary layer to get the depth used
            $preliminaryLayers = $this->layers;
            $preliminaryItems = $this->packLayer(clone $this->items, $preliminaryLayers, $layerStartDepth, $this->boxWidth, $this->boxLength, $this->box->getInnerDepth() - $layerStartDepth, 0);

            if ($preliminaryItems->count() === 0) { // preliminary === final
                $this->layers = $preliminaryLayers;
                $this->items = $preliminaryItems;
            } else {
                $this->items = $this->packLayer($this->items, $this->layers, $layerStartDepth, $this->boxWidth, $this->boxLength, $this->box->getInnerDepth() - $layerStartDepth, end($preliminaryLayers)->getDepth());
            }
        }

        if ($this->boxRotated) {
            $this->rotateLayersNinetyDegrees();
        }

        if (!$this->lookAheadMode && !$this->hasConstrainedItems) {
            $this->stabiliseLayers();
        }

        $this->logger->debug('done with this box ' . $this->box->getReference());

        return new PackedBox($this->box, $this->getPackedItemList($this->layers));
    }

    /**
     * Pack items into an individual vertical layer.
     */
    protected function packLayer(ItemList $items, array &$layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): ItemList
    {
        $layers[] = $layer = new PackedLayer();
        $prevItem = null;
        $x = $y = $rowLength = 0;
        $skippedItems = [];

        while ($items->count() > 0) {
            $itemToPack = $items->extract();

            //skip items that are simply too heavy or too large
            if (!$this->checkNonDimensionalConstraints($itemToPack, $layers)) {
                continue;
            }

            $orientatedItem = $this->getOrientationForItem($itemToPack, $prevItem, $items, $layers, count($skippedItems) + $items->count() === 0, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z);

            if ($orientatedItem instanceof OrientatedItem) {
                $packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
                $layer->insert($packedItem);

                $rowLength = max($rowLength, $orientatedItem->getLength());

                //Figure out if we can stack the next item vertically on top of this rather than side by side
                //e.g. when we've packed a tall item, and have just put a shorter one next to it.
                $stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $orientatedItem->getDepth();
                $stackedZ = $z + $orientatedItem->getDepth();
                $stackSkippedItems = [];
                while ($items->count() > 0) {
                    $itemToTryStacking = $items->extract();
                    $stackedItem = $this->getOrientationForItem($itemToTryStacking, $prevItem, $items, $layers, $items->count() === 1, $orientatedItem->getWidth(), $orientatedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ);
                    if ($stackedItem && $this->checkNonDimensionalConstraints($itemToTryStacking, $layers)) {
                        $layer->insert(PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ));
                        $stackableDepth -= $stackedItem->getDepth();
                        $stackedZ += $stackedItem->getDepth();
                    } else {
                        $stackSkippedItems[] = $itemToTryStacking;
                        // abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
                        while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
                            $stackSkippedItems[] = $items->extract();
                        }
                    }
                }
                if ($stackSkippedItems) {
                    $items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
                }
                $x += $orientatedItem->getWidth();

                $prevItem = $packedItem;
                if ($items->count() === 0) {
                    $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
                    $skippedItems = [];
                }
            } elseif (count($layer->getItems()) === 0) { // zero items on layer
                $this->logger->debug("doesn't fit on layer even when empty, skipping for good");
                continue;
            } elseif ($items->count() > 0) { // skip for now, move on to the next item
                $this->logger->debug("doesn't fit, skipping for now");
                $skippedItems[] = $itemToPack;
                // abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
                while ($items->count() > 2 && static::isSameDimensions($itemToPack, $items->top())) {
                    $skippedItems[] = $items->extract();
                }
            } elseif ($x > 0) {
                $this->logger->debug('No more fit in width wise, resetting for new row');
                $lengthLeft -= $rowLength;
                $y += $rowLength;
                $x = $rowLength = 0;
                $skippedItems[] = $itemToPack;
                $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
                $skippedItems = [];
                $prevItem = null;
                continue;
            } else {
                $this->logger->debug('no items fit, so starting next vertical layer');
                $skippedItems[] = $itemToPack;
                return ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
            }
        }

        return $items;
    }

    /**
     * During packing, it is quite possible that layers have been created that aren't physically stable
     * i.e. they overhang the ones below.
     *
     * This function reorders them so that the ones with the greatest surface area are placed at the bottom
     */
    public function stabiliseLayers(): void
    {
        $stabiliser = new LayerStabiliser();
        $stabiliser->setLogger($this->logger);
        $this->layers = $stabiliser->stabilise($this->layers);
    }

    protected function getOrientationForItem(
        Item $itemToPack,
        ?PackedItem $prevItem,
        ItemList $nextItems,
        array $layers,
        bool $isLastItem,
        int $maxWidth,
        int $maxLength,
        int $maxDepth,
        int $rowLength,
        int $x,
        int $y,
        int $z
    ): ?OrientatedItem {
        $this->logger->debug(
            "evaluating item {$itemToPack->getDescription()} for fit",
            [
                'item' => $itemToPack,
                'space' => [
                    'maxWidth' => $maxWidth,
                    'maxLength' => $maxLength,
                    'maxDepth' => $maxDepth,
                ],
            ]
        );

        $cacheKey = spl_object_id($itemToPack) . '|' . $x . '|' . $y . '|' . $z . '|' . $nextItems->count();

        if (!isset($this->orientatedItemCache[$cacheKey])) {
            $prevOrientatedItem = $prevItem ? $prevItem->toOrientatedItem() : null;
            $prevPackedItemList = $itemToPack instanceof ConstrainedPlacementItem ? $this->getPackedItemList($layers) : new PackedItemList(); // don't calculate it if not going to be used

            $this->orientatedItemCache[$cacheKey] = $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevOrientatedItem, $nextItems, $isLastItem, $maxWidth, $maxLength, $maxDepth, $rowLength, $x, $y, $z, $prevPackedItemList);
        }

        return $this->orientatedItemCache[$cacheKey];
    }

    /**
     * As well as purely dimensional constraints, there are other constraints that need to be met
     * e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
     */
    protected function checkNonDimensionalConstraints(Item $itemToPack, array $layers): bool
    {
        $customConstraintsOK = true;
        if ($itemToPack instanceof ConstrainedItem) {
            $customConstraintsOK = $itemToPack->canBePackedInBox($this->getPackedItemList($layers), $this->box);
        }

        return $customConstraintsOK && $itemToPack->getWeight() <= $this->getRemainingWeightAllowed($layers);
    }

    /**
     * Swap back width/length of the packed items to match orientation of the box if needed.
     */
    protected function rotateLayersNinetyDegrees(): void
    {
        foreach ($this->layers as $i => $originalLayer) {
            $newLayer = new PackedLayer();
            foreach ($originalLayer->getItems() as $item) {
                $packedItem = new PackedItem($item->getItem(), $item->getY(), $item->getX(), $item->getZ(), $item->getLength(), $item->getWidth(), $item->getDepth());
                $newLayer->insert($packedItem);
            }
            $this->layers[$i] = $newLayer;
        }
    }

    /**
     * Generate a single list of items packed.
     */
    protected function getPackedItemList(array $layers): PackedItemList
    {
        $packedItemList = new PackedItemList();
        foreach ($layers as $layer) {
            foreach ($layer->getItems() as $packedItem) {
                $packedItemList->insert($packedItem);
            }
        }

        return $packedItemList;
    }

    /**
     * Return the current packed depth.
     */
    protected function getCurrentPackedDepth(): int
    {
        $depth = 0;
        foreach ($this->layers as $layer) {
            $depth += $layer->getDepth();
        }

        return $depth;
    }

    private function getRemainingWeightAllowed(array $layers): int
    {
        $remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
        foreach ($layers as $layer) {
            $remainingWeightAllowed -= $layer->getWeight();
        }

        return $remainingWeightAllowed;
    }

    /**
     * Compare two items to see if they have same dimensions.
     */
    protected static function isSameDimensions(Item $itemA, Item $itemB): bool
    {
        if ($itemA === $itemB) {
            return true;
        }
        $itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
        $itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
        sort($itemADimensions);
        sort($itemBDimensions);

        return $itemADimensions === $itemBDimensions;
    }
}


1		<?php
2		/**
3		* Box packing (3D bin packing, knapsack problem).
4		*
5		* @author Doug Wright
6		*/
7		declare(strict_types=1);
8
9		namespace DVDoug\BoxPacker;
10
11		use function count;
12		use function max;
13		use function min;
14		use Psr\Log\LoggerAwareInterface;
15		use Psr\Log\LoggerInterface;
16		use Psr\Log\NullLogger;
17
18		/**
19		* Actual packer.
20		*
21		* @author Doug Wright
22		*/
23		class VolumePacker implements LoggerAwareInterface
24		{
25		/**
26		* The logger instance.
27		*
28		* @var LoggerInterface
29		*/
30		protected $logger;
31
32		/**
33		* Box to pack items into.
34		*
35		* @var Box
36		*/
37		protected $box;
38
39		/**
40		* @var int
41		*/
42		protected $boxWidth;
43
44		/**
45		* @var int
46		*/
47		protected $boxLength;
48
49		/**
50		* List of items to be packed.
51		*
52		* @var ItemList
53		*/
54		protected $items;
55
56		/**
57		* Whether the box was rotated for packing.
58		*
59		* @var bool
60		*/
61		protected $boxRotated = false;
62
63		/**
64		* @var PackedLayer[]
65		*/
66		protected $layers = [];
67
68		/**
69		* Whether the packer is in look-ahead mode (i.e. working ahead of the main packing).
70		*
71		* @var bool
72		*/
73		protected $lookAheadMode = false;
74
75		/**
76		* @var OrientatedItemFactory
77		*/
78		private $orientatedItemFactory;
79
80		/**
81		* @var OrientatedItem[]
82		*/
83		private $orientatedItemCache = [];
84
85		/** @var bool */
86		private $hasConstrainedItems;
87
88		/**
89		* Constructor.
90		*/
91	53	public function __construct(Box $box, ItemList $items)
92		{
93	53	$this->box = $box;
94	53	$this->items = clone $items;
95
96	53	$this->boxWidth = max($this->box->getInnerWidth(), $this->box->getInnerLength());
97	53	$this->boxLength = min($this->box->getInnerWidth(), $this->box->getInnerLength());
98	53	$this->logger = new NullLogger();
99
100		// we may have just rotated the box for packing purposes, record if we did
101	53	if ($this->box->getInnerWidth() !== $this->boxWidth \|\| $this->box->getInnerLength() !== $this->boxLength) {
102	18	$this->boxRotated = true;
103		}
104
105	53	$this->hasConstrainedItems = $items->hasConstrainedItems();
106
107	53	$this->orientatedItemFactory = new OrientatedItemFactory($this->box);
108	53	$this->orientatedItemFactory->setLogger($this->logger);
109	53	}
110
111		/**
112		* Sets a logger.
113		*/
114	24	public function setLogger(LoggerInterface $logger): void
115		{
116	24	$this->logger = $logger;
117	24	$this->orientatedItemFactory->setLogger($logger);
118	24	}
119
120		/**
121		* @internal
122		*/
123	17	public function setLookAheadMode(bool $lookAhead): void
124		{
125	17	$this->lookAheadMode = $lookAhead;
126	17	}
127
128		/**
129		* Pack as many items as possible into specific given box.
130		*
131		* @return PackedBox packed box
132		*/
133	53	public function pack(): PackedBox
134		{
135	53	$this->logger->debug("[EVALUATING BOX] {$this->box->getReference()}", ['box' => $this->box]);
136
137	53	while ($this->items->count() > 0) {
138	53	$layerStartDepth = $this->getCurrentPackedDepth();
139
140		//do a preliminary layer to get the depth used
141	53	$preliminaryLayers = $this->layers;
142	53	$preliminaryItems = $this->packLayer(clone $this->items, $preliminaryLayers, $layerStartDepth, $this->boxWidth, $this->boxLength, $this->box->getInnerDepth() - $layerStartDepth, 0);
143
144	53	if ($preliminaryItems->count() === 0) { // preliminary === final
145	53	$this->layers = $preliminaryLayers;
146	53	$this->items = $preliminaryItems;
147		} else {
148	39	$this->items = $this->packLayer($this->items, $this->layers, $layerStartDepth, $this->boxWidth, $this->boxLength, $this->box->getInnerDepth() - $layerStartDepth, end($preliminaryLayers)->getDepth());
149		}
150		}
151
152	53	if ($this->boxRotated) {
153	18	$this->rotateLayersNinetyDegrees();
154		}
155
156	53	if (!$this->lookAheadMode && !$this->hasConstrainedItems) {
157	53	$this->stabiliseLayers();
158		}
159
160	53	$this->logger->debug('done with this box ' . $this->box->getReference());
161
162	53	return new PackedBox($this->box, $this->getPackedItemList($this->layers));
163		}
164
165		/**
166		* Pack items into an individual vertical layer.
167		*/
168	53	protected function packLayer(ItemList $items, array &$layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): ItemList
169		{
170	53	$layers[] = $layer = new PackedLayer();
171	53	$prevItem = null;
172	53	$x = $y = $rowLength = 0;
173	53	$skippedItems = [];
174
175	53	while ($items->count() > 0) {
176	53	$itemToPack = $items->extract();
177
178		//skip items that are simply too heavy or too large
179	53	if (!$this->checkNonDimensionalConstraints($itemToPack, $layers)) {
180	8	continue;
181		}
182
183	53	$orientatedItem = $this->getOrientationForItem($itemToPack, $prevItem, $items, $layers, count($skippedItems) + $items->count() === 0, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z);
184
185	53	if ($orientatedItem instanceof OrientatedItem) {
186	53	$packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
187	53	$layer->insert($packedItem);
188
189	53	$rowLength = max($rowLength, $orientatedItem->getLength());
190
191		//Figure out if we can stack the next item vertically on top of this rather than side by side
192		//e.g. when we've packed a tall item, and have just put a shorter one next to it.
193	53	$stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $orientatedItem->getDepth();
194	53	$stackedZ = $z + $orientatedItem->getDepth();
195	53	$stackSkippedItems = [];
196	53	while ($items->count() > 0) {
197	50	$itemToTryStacking = $items->extract();
198	50	$stackedItem = $this->getOrientationForItem($itemToTryStacking, $prevItem, $items, $layers, $items->count() === 1, $orientatedItem->getWidth(), $orientatedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ);
199	50	if ($stackedItem && $this->checkNonDimensionalConstraints($itemToTryStacking, $layers)) {
200	7	$layer->insert(PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ));
201	7	$stackableDepth -= $stackedItem->getDepth();
202	7	$stackedZ += $stackedItem->getDepth();
203		} else {
204	50	$stackSkippedItems[] = $itemToTryStacking;
205		// abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
206	50	while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
207	39	$stackSkippedItems[] = $items->extract();
208		}
209		}
210		}
211	53	if ($stackSkippedItems) {
212	50	$items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
213		}
214	53	$x += $orientatedItem->getWidth();
215
216	53	$prevItem = $packedItem;
217	53	if ($items->count() === 0) {
218	50	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
219	53	$skippedItems = [];
220		}
221	44	} elseif (count($layer->getItems()) === 0) { // zero items on layer
222	23	$this->logger->debug("doesn't fit on layer even when empty, skipping for good");
223	23	continue;
224	42	} elseif ($items->count() > 0) { // skip for now, move on to the next item
225	37	$this->logger->debug("doesn't fit, skipping for now");
226	37	$skippedItems[] = $itemToPack;
227		// abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
228	37	while ($items->count() > 2 && static::isSameDimensions($itemToPack, $items->top())) {
229	20	$skippedItems[] = $items->extract();
230		}
231	42	} elseif ($x > 0) {
232	42	$this->logger->debug('No more fit in width wise, resetting for new row');
233	42	$lengthLeft -= $rowLength;
234	42	$y += $rowLength;
235	42	$x = $rowLength = 0;
236	42	$skippedItems[] = $itemToPack;
237	42	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
238	42	$skippedItems = [];
239	42	$prevItem = null;
240	42	continue;
241		} else {
242	39	$this->logger->debug('no items fit, so starting next vertical layer');
243	39	$skippedItems[] = $itemToPack;
244	39	return ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
245		}
246		}
247
248	53	return $items;
249		}
250
251		/**
252		* During packing, it is quite possible that layers have been created that aren't physically stable
253		* i.e. they overhang the ones below.
254		*
255		* This function reorders them so that the ones with the greatest surface area are placed at the bottom
256		*/
257	53	public function stabiliseLayers(): void
258		{
259	53	$stabiliser = new LayerStabiliser();
260	53	$stabiliser->setLogger($this->logger);
261	53	$this->layers = $stabiliser->stabilise($this->layers);
262	53	}
263
264	53	protected function getOrientationForItem(
265		Item $itemToPack,
266		?PackedItem $prevItem,
267		ItemList $nextItems,
268		array $layers,
269		bool $isLastItem,
270		int $maxWidth,
271		int $maxLength,
272		int $maxDepth,
273		int $rowLength,
274		int $x,
275		int $y,
276		int $z
277		): ?OrientatedItem {
278	53	$this->logger->debug(
279	53	"evaluating item {$itemToPack->getDescription()} for fit",
280		[
281	53	'item' => $itemToPack,
282		'space' => [
283	53	'maxWidth' => $maxWidth,
284	53	'maxLength' => $maxLength,
285	53	'maxDepth' => $maxDepth,
286		],
287		]
288		);
289
290	53	$cacheKey = spl_object_id($itemToPack) . '\|' . $x . '\|' . $y . '\|' . $z . '\|' . $nextItems->count();
291
292	53	if (!isset($this->orientatedItemCache[$cacheKey])) {
293	53	$prevOrientatedItem = $prevItem ? $prevItem->toOrientatedItem() : null;
294	53	$prevPackedItemList = $itemToPack instanceof ConstrainedPlacementItem ? $this->getPackedItemList($layers) : new PackedItemList(); // don't calculate it if not going to be used
295
296	53	$this->orientatedItemCache[$cacheKey] = $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevOrientatedItem, $nextItems, $isLastItem, $maxWidth, $maxLength, $maxDepth, $rowLength, $x, $y, $z, $prevPackedItemList);
297		}
298
299	53	return $this->orientatedItemCache[$cacheKey];
300		}
301
302		/**
303		* As well as purely dimensional constraints, there are other constraints that need to be met
304		* e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
305		*/
306	53	protected function checkNonDimensionalConstraints(Item $itemToPack, array $layers): bool
307		{
308	53	$customConstraintsOK = true;
309	53	if ($itemToPack instanceof ConstrainedItem) {
310	1	$customConstraintsOK = $itemToPack->canBePackedInBox($this->getPackedItemList($layers), $this->box);
311		}
312
313	53	return $customConstraintsOK && $itemToPack->getWeight() <= $this->getRemainingWeightAllowed($layers);
314		}
315
316		/**
317		* Swap back width/length of the packed items to match orientation of the box if needed.
318		*/
319	18	protected function rotateLayersNinetyDegrees(): void
320		{
321	18	foreach ($this->layers as $i => $originalLayer) {
322	18	$newLayer = new PackedLayer();
323	18	foreach ($originalLayer->getItems() as $item) {
324	17	$packedItem = new PackedItem($item->getItem(), $item->getY(), $item->getX(), $item->getZ(), $item->getLength(), $item->getWidth(), $item->getDepth());
325	17	$newLayer->insert($packedItem);
326		}
327	18	$this->layers[$i] = $newLayer;
328		}
329	18	}
330
331		/**
332		* Generate a single list of items packed.
333		*/
334	53	protected function getPackedItemList(array $layers): PackedItemList
335		{
336	53	$packedItemList = new PackedItemList();
337	53	foreach ($layers as $layer) {
338	53	foreach ($layer->getItems() as $packedItem) {
339	53	$packedItemList->insert($packedItem);
340		}
341		}
342
343	53	return $packedItemList;
344		}
345
346		/**
347		* Return the current packed depth.
348		*/
349	53	protected function getCurrentPackedDepth(): int
350		{
351	53	$depth = 0;
352	53	foreach ($this->layers as $layer) {
353	39	$depth += $layer->getDepth();
354		}
355
356	53	return $depth;
357		}
358
359	53	private function getRemainingWeightAllowed(array $layers): int
360		{
361	53	$remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
362	53	foreach ($layers as $layer) {
363	53	$remainingWeightAllowed -= $layer->getWeight();
364		}
365
366	53	return $remainingWeightAllowed;
367		}
368
369		/**
370		* Compare two items to see if they have same dimensions.
371		*/
372	43	protected static function isSameDimensions(Item $itemA, Item $itemB): bool
373		{
374	43	if ($itemA === $itemB) {
375	31	return true;
376		}
377	18	$itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
378	18	$itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
379	18	sort($itemADimensions);
380	18	sort($itemBDimensions);
381
382	18	return $itemADimensions === $itemBDimensions;
383		}
384		}
385

dvdoug / BoxPacker

Push — refactor_prep ( b6784f...5f8508 )

VolumePacker::packLayer() C

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